A specialized, in-depth body of knowledge, skills, and competence that is a major, identifiable component of the relevant discipline. [D03621] 19
Knowledge and skills gained from both/either training and/or experience, i.e., practice wisdom)
() a high level of knowledge or skill
a special skill or knowledge gained by experience
The skills and knowledge of somebody who is an expert in something
skillfulness by virtue of possessing special knowledge
Specialized domain knowledge, skills, tricks, shortcuts and rules-of-thumb that provide an ability to rapidly and effectively solve problems in the problem domain.
Expert opinion, skill or knowledge in the field.
The skill, knowledge, judgement of an expert.
Expertise consists of those characteristics, skills and knowledge of a person (that is, expert) or of a system, which distinguish experts from novices and less experienced people. In many domains there are objective measures of performance capable of distinguishing experts from novices:expert chess players will almost always win games against recreational chess players; expert medical specialists are more likely to diagnose a disease correctly and so on.